public String getUsername() {
        final RequestManager requestManager = ComponentUtil.getRequestManager();
        return requestManager.findUserBean(FessUserBean.class).map(FessUserBean::getUserId).orElse(Constants.GUEST_USER);
    }

    public Date getCurrentTime() {
        return new Date(getCurrentTimeAsLong());
    }

    public long getCurrentTimeAsLong() {
        return System.currentTimeMillis();
    }